Thread: What am I looking at - spark plug hole #1
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Old 03-19-2019, 08:43 AM   #13
The Radium King
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Quote:
Originally Posted by truegearhead View Post
Is it somehow a reflection of the borroacope itself? Odd explanation....but very odd problem.
that's what i was thinking, as you will encounter some of the pistons at TDC.
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